The goal is to find a lightweight method for your setup that supports your pot somewhere near
2.5-4cm or 1-1.5 inches (varies with setup) above your stove.

Rocks - The simplest method is to find a couple of rocks the right height. If you decide to pack your rocks, pumice seems to be one of the lightest options (but not the most durable). You can also drill holes in your rock to lighten your load but most hikers plan on finding suitable rocks on the trail.

Tent Stakes - You can stick three or more steel or titanium tent stakes
or nails in the
ground. Steel bicycle spokes might also be sturdy enough for your setup. Note - Aluminum
and brass aren't recommended as they may not be able
to support a full pot at high temperatures.

Welded Wire - Hardware cloth, gutter strainers and expanded sheet can be trimmed and bent into
all kinds of shapes. Stainless steel welded wire is solid, feels nice,
doesn't rust and isn't poisonous when heated. Try
McMaster-Carr
if you can't find what you are looking for at the local hardware or metal shop.

To save weight, you can trim out unneeded sections between necessary supports.
Note - avoid using galvanized steel materials for your pot stand as it will release poisonous gases when heated.

Other versions of this setup include setting a stand inside or on top of your stove, depending on your stove design.

Cans - Trimmed down and ventilated tin cans (such as coffee cans).
These may also double as wood burners.

C-ration can

If you find a can the perfect height for your application, you
can simply cut out the top and add some vent holes in the side of the can.
Big holes may work best, but you can also just use a church key to make several
holes all around the top and bottom edge of the can.

SideBurner Stoves - You can even set your pot on your stove if you set it up with
jets on the side. There are now many versions of the sideburner stoves
being actively used in the backpacking community. These generally
create a not so stable pot/potstand configuration, but are still very
popular for their simplicity and light weight.

Other Potstands - Walk down the aisles of your local hardware store and try fitting
things around your stove and under your pot. Just remember to avoid
galvanized steel as it releases toxic gasses when heated and can cause
heavy metal poisoning.

Various pieces of sheet metal may also be cut up and bent
into a number of usable configurations.

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